6842399278993 has 2 divisors, whose sum is σ = 6842399278994. Its totient is φ = 6842399278992.

The previous prime is 6842399278937. The next prime is 6842399279039. The reversal of 6842399278993 is 3998729932486.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4561504949824 + 2280894329169 = 2135768^2 + 1510263^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6842399278993 is a prime.

It is not a weakly prime, because it can be changed into another prime (6842399278933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3421199639496 + 3421199639497.

It is an arithmetic number, because the mean of its divisors is an integer number (3421199639497).

Almost surely, 2^{6842399278993} is an apocalyptic number.

It is an amenable number.

6842399278993 is a deficient number, since it is larger than the sum of its proper divisors (1).

6842399278993 is an equidigital number, since it uses as much as digits as its factorization.

6842399278993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2539579392, while the sum is 79.

The spelling of 6842399278993 in words is "six trillion, eight hundred forty-two billion, three hundred ninety-nine million, two hundred seventy-eight thousand, nine hundred ninety-three".